18778917

素因数分解:

$3^1\times {\mathrm{43}}^1\times {\mathrm{149}}^1\times {\mathrm{977}}^1$

素因数の和:1172

約数の個数: 16

約数和(自身を含む): 25819200

約数和(自身を除く): 7040283

約数列:

[1, 3, 43, 129, 149, 447, 977, 2931, 6407, 19221, 42011, 126033, 145573, 436719, 6259639, 18778917]

約数ペア:

[(1, 18778917), (3, 6259639), (43, 436719), (129, 145573), (149, 126033), (447, 42011), (977, 19221), (2931, 6407)]